private static void TestThreePoints(Point2d c, double radius, double a1, double am, double a2)
{
CircleArc2 arc = new CircleArc2(c, radius, a1, a2);
Assert.IsTrue(arc.GetAngle(arc.TMin).EpsilonEquals(a1));
Assert.IsTrue(arc.GetAngle((arc.TMin + arc.TMax) / 2).EpsilonEquals(am));
Assert.IsTrue(arc.GetAngle(arc.TMax).EpsilonEquals(a2));
// Se toman 3 puntos y se calcula el centro, que tiene que coincidir con el centro.
Point2d p1 = arc.GetPosition(arc.TMin);
Point2d p2 = arc.GetPosition((arc.TMin + arc.TMax) / 2);
Point2d p3 = arc.GetPosition(arc.TMax);
Point2d cc = CircleArc2Utils.GetCenter(p1, p2, p3);
Assert.IsTrue(arc.Center.EpsilonEquals(cc));
// Se calcula el arco formado por los 3 puntos, que tiene que coincidir con el arco.
CircleArc2 arc2 = CircleArc2Utils.ThreePoints(p1, p2, p3);
Assert.IsTrue(arc.Angle1.EpsilonEquals(arc2.Angle1));
//Assert.IsTrue(arc.Angle2.EpsilonEquals(arc2.Angle2));
Assert.IsTrue(arc.AdvAngle.EpsilonEquals(arc2.AdvAngle));
Assert.IsTrue(arc.Center.EpsilonEquals(arc2.Center));
Assert.IsTrue(arc.Radius.EpsilonEquals(arc2.Radius));
Assert.IsTrue(arc.TMin.EpsilonEquals(arc2.TMin));
Assert.IsTrue(arc.TMax.EpsilonEquals(arc2.TMax));
}
public void Test1()
{
// Angulos pequeños
// Arco superior ida y vuelta.
TestThreePoints(new Point2d(10, 10), 10, 3 * SysMath.PI / 4, 2 * SysMath.PI / 4, SysMath.PI / 4);
TestThreePoints(new Point2d(10, 10), 10, SysMath.PI / 4, 2 * SysMath.PI / 4, 3 * SysMath.PI / 4);
// Arco inferior ida y vuelta.
TestThreePoints(new Point2d(10, 10), 10, 5 * SysMath.PI / 4, 6 * SysMath.PI / 4, 7 * SysMath.PI / 4);
TestThreePoints(new Point2d(10, 10), 10, 7 * SysMath.PI / 4, 6 * SysMath.PI / 4, 5 * SysMath.PI / 4);
// Angulos grandes
// Arco superior ida y vuelta.
TestThreePoints(new Point2d(10, 10), 10, 5 * SysMath.PI / 4, 2 * SysMath.PI / 4, -SysMath.PI / 4);
TestThreePoints(new Point2d(10, 10), 10, 7 * SysMath.PI / 4, 10 * SysMath.PI / 4, 13 * SysMath.PI / 4);
// Arco inferior ida y vuelta.
TestThreePoints(new Point2d(10, 10), 10, 3 * SysMath.PI / 4, 6 * SysMath.PI / 4, 9 * SysMath.PI / 4);
TestThreePoints(new Point2d(10, 10), 10, SysMath.PI / 4, -2 * SysMath.PI / 4, -5 * SysMath.PI / 4);
// Se prueban 3 puntos, 2 iguales.
AssertEx.AssertException <Exception>(() =>
{
CircleArc2Utils.GetCenter(new Point2d(10, 10), new Point2d(10, 10), new Point2d(30, 10));
});
// Se prueban 3 puntos alineados.
AssertEx.AssertException <Exception>(() =>
{
CircleArc2Utils.GetCenter(new Point2d(10, 10), new Point2d(20, 10), new Point2d(30, 10));
});
}